1 files changed, 11 insertions, 5 deletions

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 4a40a200d769..15dd59b84e94 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1712,6 +1712,7 @@ static int process_checks(struct r1bio *r1_bio)
         struct r1conf *conf = mddev->private;
         int primary;
         int i;
+        int vcnt;
 
         for (primary = 0; primary < conf->raid_disks * 2; primary++)
                 if (r1_bio->bios[primary]->bi_end_io == end_sync_read &&
@@ -1721,9 +1722,9 @@ static int process_checks(struct r1bio *r1_bio)
                         break;
                 }
         r1_bio->read_disk = primary;
+        vcnt = (r1_bio->sectors + PAGE_SIZE / 512 - 1) >> (PAGE_SHIFT - 9);
         for (i = 0; i < conf->raid_disks * 2; i++) {
                 int j;
-                int vcnt = r1_bio->sectors >> (PAGE_SHIFT- 9);
                 struct bio *pbio = r1_bio->bios[primary];
                 struct bio *sbio = r1_bio->bios[i];
                 int size;
@@ -1738,7 +1739,7 @@ static int process_checks(struct r1bio *r1_bio)
                                 s = sbio->bi_io_vec[j].bv_page;
                                 if (memcmp(page_address(p),
                                            page_address(s),
-                                           PAGE_SIZE))
+                                           sbio->bi_io_vec[j].bv_len))
                                         break;
                         }
                 } else
@@ -2386,8 +2387,7 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int *skipp
                 int ok = 1;
                 for (i = 0 ; i < conf->raid_disks * 2 ; i++)
                         if (r1_bio->bios[i]->bi_end_io == end_sync_write) {
-                                struct md_rdev *rdev =
-                                        rcu_dereference(conf->mirrors[i].rdev);
+                                struct md_rdev *rdev = conf->mirrors[i].rdev;
                                 ok = rdev_set_badblocks(rdev, sector_nr,
                                                         min_bad, 0
                                         ) && ok;
@@ -2636,11 +2636,13 @@ static struct r1conf *setup_conf(struct mddev *mddev)
         return ERR_PTR(err);
 }
 
+static int stop(struct mddev *mddev);
 static int run(struct mddev *mddev)
 {
         struct r1conf *conf;
         int i;
         struct md_rdev *rdev;
+        int ret;
 
         if (mddev->level != 1) {
                 printk(KERN_ERR "md/raid1:%s: raid level not set to mirroring (%d)\n",
@@ -2705,7 +2707,11 @@ static int run(struct mddev *mddev)
                 mddev->queue->backing_dev_info.congested_data = mddev;
                 blk_queue_merge_bvec(mddev->queue, raid1_mergeable_bvec);
         }
-        return md_integrity_register(mddev);
+
+        ret =  md_integrity_register(mddev);
+        if (ret)
+                stop(mddev);
+        return ret;
 }
 
 static int stop(struct mddev *mddev)